Grim Keepers are the Hoodlum Army's heavy-forces solution for securing captured areas. Deployed to guard critical points with extreme prejudice, these unpredictable living walls keep an army of tiny creatures called Grims behind their massive shield arms. Trained to explode on contact, Grims will hunt down and dispatch intruders. Grim Keepers also keep a jug of plum juice handy – to drink away the shellshock after losing precious Grims in combat.

A Grim Keeper is a type of Hoodlum enemy which appears in Rayman 3. Its name is a pun on "Grim Reaper".

Grim Keepers are noticeably larger than other Hoodlums. These heavy infantry soldiers seem to care almost exclusively for their own protection, Grim Keepers carry a large, impenetrable shield which they carry around in front of them making them difficult to hit. Underneath their robes, the Grim Keepers keep an infinite number of Grims; hence their name. As the Grim Keepers themselves are unarmed, these Grims are their only means of offence. Every now and then they pull up their robe to allow a single Grim to run free at Rayman. Apart from the Grim Keepers in Racket Jump, there are two Grim Keepers in Rayman 3.

A Grim Keeper is playable in the minigame Racket Jump, in which the player competes with another Grim Keeper is a game of tennis. Instead of rackets they use their shields, while the ball is in fact a bottle of plum juice supplied by a Grim.